I shoot mostly GT Trads and CE Heritage shafts, but I picked up a few of the Predator II 2040 shafts (.600 spine) because I needed a lower spine arrow for a couple of bows. I really like them, seem very consistant, and shoot good too. I've picked up more in .500 and .400 spine since. I have read where others say they are not as tough as some other shafts. That may be true, I haven't stumped with them, but I stump shoot with footed carbons. I'm sure a fella could foot the Predators also. I like the price of them too, and my local archery shops (compounds) carry the shafts and the components. Great shaft for the money.